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Rifles, Reloading, Optics, Equipment
Reloading
210 bergers blowing up?? help 30-378 wby
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<blockquote data-quote="daveosok" data-source="post: 109494"><p>We pushed the Berger 210 behind 100 grains of H1000 out of a 34 in tube at 3300 fps. We did not witness what you are describing but they wouldnt group worth a crap.</p><p></p><p>When then swapped to Berger 190's and using the same load we pushed them to 3600 fps. Accuracy was good but the barrel needed to be cleaned or the pressure would increase after around 10 shots. </p><p></p><p>Copper fouling build up caused a smaller bore AND carbon build-up in the space between the start of the case mouth and begining of the throat.</p><p></p><p>This carbon build up caused some serious pressure signs after about 10 rnds and needed to be cleaned as well as the copper fouling.</p><p></p><p>Is this a true WBY rifle? If so it more than likely has loads of freebore and can be subjected to the same carbon build-up as well as horrible copper fouling.</p><p></p><p>Inspect the bore and pay particular attention to the throat area.</p><p></p><p>I have yet to dust a Berger bullet but d-a has done it in his 257 STW but thats a bit different story of say 3700 fps area.</p><p></p><p>The 1/8th round imprint is the ejector mark. This carbon build-up can cause the area of the chamber where the neck seats to become smaller and this will increase your pressure to extremes.</p><p></p><p>Dave</p></blockquote><p></p>
[QUOTE="daveosok, post: 109494"] We pushed the Berger 210 behind 100 grains of H1000 out of a 34 in tube at 3300 fps. We did not witness what you are describing but they wouldnt group worth a crap. When then swapped to Berger 190's and using the same load we pushed them to 3600 fps. Accuracy was good but the barrel needed to be cleaned or the pressure would increase after around 10 shots. Copper fouling build up caused a smaller bore AND carbon build-up in the space between the start of the case mouth and begining of the throat. This carbon build up caused some serious pressure signs after about 10 rnds and needed to be cleaned as well as the copper fouling. Is this a true WBY rifle? If so it more than likely has loads of freebore and can be subjected to the same carbon build-up as well as horrible copper fouling. Inspect the bore and pay particular attention to the throat area. I have yet to dust a Berger bullet but d-a has done it in his 257 STW but thats a bit different story of say 3700 fps area. The 1/8th round imprint is the ejector mark. This carbon build-up can cause the area of the chamber where the neck seats to become smaller and this will increase your pressure to extremes. Dave [/QUOTE]
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210 bergers blowing up?? help 30-378 wby
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